About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing of Metals: Multiscale and Non-Equilibrium Solidification Fundamentals
|
| Presentation Title |
Alloy Amalgamation via Additive Manufacturing: Tailoring Strain Hardening through Stress Induced α″ Martensitic Transformation |
| Author(s) |
Muhammad Akmal, Jenniffer Bustillos, Atieh Moridi |
| On-Site Speaker (Planned) |
Muhammad Akmal |
| Abstract Scope |
This study introduces 'alloy amalgamation'—blending commercial alloys during additive manufacturing to create titanium alloys with tailored, multiphase microstructures. These microstructures, driven by compositional heterogeneity, enable combinations of structural properties that are challenging to achieve through conventional processing. Using directed energy deposition (DED), we mixed an α+β alloy (Ti-6Al-4V) with a near-β alloy (Ti-5553) in equal proportions. This approach produced compositional heterogeneity at the interface, enriching a part of the melt pool with β-stabilizing elements and thus increasing the volume fraction of β and α″ (orthorhombic martensite)—both comparatively soft phases. Tensile testing revealed pronounced strain hardening due to transformation-induced plasticity (TRIP) via β → α″ transformation. Coexisting phases also activated multiple deformation mechanisms, resulting in high strength, enhanced ductility, and a reduced elastic modulus. Transmission electron microscopy further revealed nanoscale ordered and disordered domains, including the O′ phase, providing additional insight into the deformation behavior. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Mechanical Properties, Titanium |